63 lines
1.2 KiB
PHP
63 lines
1.2 KiB
PHP
<?php
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/*
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* Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
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* SPDX-License-Identifier: MIT
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*/
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declare(strict_types=1);
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namespace Respect\Validation\Rules;
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use finfo;
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use SplFileInfo;
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use function is_file;
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use function is_string;
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use function mb_strpos;
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use const FILEINFO_MIME_TYPE;
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/**
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* Validates if the file is a valid image by checking its MIME type.
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*
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* @author Danilo Benevides <danilobenevides01@gmail.com>
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* @author Guilherme Siani <guilherme@siani.com.br>
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* @author Henrique Moody <henriquemoody@gmail.com>
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*/
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final class Image extends AbstractRule
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{
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/**
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* @var finfo
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*/
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private $fileInfo;
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/**
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* Initializes the rule.
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*/
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public function __construct(?finfo $fileInfo = null)
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{
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$this->fileInfo = $fileInfo ?: new finfo(FILEINFO_MIME_TYPE);
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}
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/**
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* {@inheritDoc}
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*/
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public function validate($input): bool
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{
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if ($input instanceof SplFileInfo) {
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return $this->validate($input->getPathname());
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}
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if (!is_string($input)) {
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return false;
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}
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if (!is_file($input)) {
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return false;
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}
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return mb_strpos((string) $this->fileInfo->file($input), 'image/') === 0;
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}
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}
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